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* Certified Data provided for On-System Daily Vehicle Miles, Centerline Miles and Lane Miles are based on calendar year 2023, provided by TPP-Data Management. These mileage statistics are On-System only (under the jurisdiction of TxDOT).
| County | Value * |
|---|---|
| Collin | 1,608.983 |
| Dallas | 3,589.780 |
| Denton | 1,845.908 |
| Ellis | 1,652.018 |
| Kaufman | 1,234.933 |
| Navarro | 1,276.456 |
| Rockwall | 366.233 |